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I was wondering why Nintendo came up with PAL, NTSC U and NTSC J versions of their games. Is there some kind of major differences between them? Also, I noticed that many people who have an NTSC U Wii are downloading the PAL Mario Kart, and some are having issues playing it. What advantage does PAL have over NTSC? Is it simply because Mario Kart came out in PAL first?

Sorry if this is some ridiculous question, but it was bothering me and I wanted to know